In 2011, Deadmau5 was one of Ultra's fabulous darlings. They even used him in a promo video for 2012. But there was no way in hell he was going to support that nonsense again. In fact,Deadmau5 made a 12-minute video protesting the festival, ranting against its supposedly unfair pricing, formulaic atmosphere, and totally effed-up exclusivity contracts. "Five hundred and ninety-five fucking dollars for a ticket? ... Wow, someone is laughing to the bank." Unfortunately, the video has been removed. But the Mau5's rant lives on.

The Mau5 vs. Madonna

If Ultra on its own was bad, it was nothing compared to the media storm that fired up after Deadmau5 spoke up about Madonna's special appearance at the 2012 edition of the EDM fest. "HUR DUR HAS ANYONE SEEN MOLLY??," he wrote on his Facebook wall, mocking the 53-year-old "funky grandma." And the raving continued as Deadmau5 raged, "such a great message for the young music lovers at ultra. quite the f'n philanthropist. but hey, at least yer HIP AND TRENDY! fucking cant smack my head hard enough right now." He kept bitching on twitter, then wrote out a nice long rant on his Tumblr about fame and responsibility.

The Mau5 vs. Pauly D

Everyone hates Pauly D, he's an orange douche with a blowhard haircut. So when the Jersey Shore "DJ" asked fans on Twitter what they thought of his music video for single "Night of my Life," the Mau5 decided to let him have it. "Well, since you asked, I didn't really enjoy it. It looked like it cost about $150 to make, and nothing really creative about it." Later, Deadmau5 was asked if he thought Pauly D had any real talent. "Well, no," was his response, followed by "does a DJ have any DJ-talent?" Which leads us to...

The Mau5 vs. All of EDM

Most recently, Zimmerman upset his fellow DJs by declaring via Tumblr, "We all hit play," equating live performances by any electronic dance music artist to button pushing, no matter the fancy-ass equipment used. "It's not about performance art, its not about talent either (really its not)," he wrote, going on to explain how Ableton works and why he thinks anyone could do what he does with about an hour of practice. And he's right, in some ways. But other artists, like DMC World Champion A-Trak, weren't too pleased about it.